package DesignPatern.A09_命令模式.QSB.A03_升级模式;

/**
 * @Author: Du
 * @Date: 2021/7/23 15:27
 */
public abstract class Group
{
    public abstract void find();
    
    public abstract void add();
    
    public abstract void delete();
    
    public abstract void change();
    
    public abstract void plan();
}
